In this blog by Michael W Lucas, he shows us how to use ZFS snapshots with zfstools on FreeBSD.
In my recent survey of ZFS snapshot automation tools, I short-listed zfstools and zfsnap. I’ll try both, but first we’ll cover FreeBSD ZFS snapshots with zfstools. Zfstools includes a script for creating snapshots, another for removing old snapshots, and one for snapshotting MySQL databases. The configuration uses only ZFS attributes and command line arguments via cron.
Check out the full blog with instructions here: http://blather.michaelwlucas.com/archives/2140